231057011 has 4 divisors (see below), whose sum is σ = 241102992. Its totient is φ = 221011032.

The previous prime is 231056999. The next prime is 231057019. The reversal of 231057011 is 110750132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231057011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231057019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5022956 + ... + 5023001.

It is an arithmetic number, because the mean of its divisors is an integer number (60275748).

Almost surely, 2^231057011 is an apocalyptic number.

231057011 is a deficient number, since it is larger than the sum of its proper divisors (10045981).

231057011 is a wasteful number, since it uses less digits than its factorization.

231057011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10045980.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 231057011 is about 15200.5595620688. The cubic root of 231057011 is about 613.6297171104.

The spelling of 231057011 in words is "two hundred thirty-one million, fifty-seven thousand, eleven".